chase



7 Sheets-Sheet 1 T Y i J. R @000000@ T m 0 @0000000 v 0 o@0oooom\ Q a I momvooco m g 000000 0 000 0 wwwwwwmw m w E G 009000O m B TYORNEY Nov. 21, 1933.

Filed April 50, 1931 Nov. 21, 1933. G. c. CHASE CALCULATING MACHINE Filed April 30, 1931' 7 Sheets-Sheet 2 N Q H MIR R Y m M m R l A wJ M1 f 6 m w! e G NOV. 21, 3 c CHASE 1,936,046

CALCULATING MACHINE Filed April 50, 1931 7 Sheets-Sheet 5 Gm'rge C Chase NVENTOR A TTUR/Vli V Nov. 21, 1933. C CHASE 1,936,046

CALCULATING MACHINE Filed April 30, 1951 '7 Sheets-Sheet 4 George C Chase '[NVENTOR .4 froze/v1. Y

G. c. CHASE CALCULATING MACHINE Filed April 30, 1931 '7 Sheets-Sheet 5 UV VE/VTOR George C C7135 6 bfm w A TTORNE y Nov. 21, 1933.

Nov. 21, 1933. G. c. CHASE 1,936,046

CALCULATING MACHINE Filed April 30, 1931 '7 SheetsSheet 6 a Y O JWWZOQA- ATTORNEY Nov. 21, 1933. G. c. CHASE 1,936,046

CALCULATING MACHINE Filed April 30, 1931 7 Sheets-Sheet 7 munmum H (Cfia5 9/NVENT0/e A TTORNEY Patented Nov. 21, 1933 PATENT OFFICE CALCULATING momma George 0. Chase, South Orange, N. it, assignor to Monroe Calculating Machine Company, Orange, N. 3., a corporation of Delaware Application April 30, 1931.

Serial No. 533,949

7 Claims. (Cl. 23579) This invention relates to calculating machines, particularly to motor driven calculating machines for performnig multiplication and division.

The principal object of the invention is to provide means for reducing the number of cycles, for effective short cutting and rapid computation in multiplication and division.

Another object is to provide means whereby the suitable multiplier-key may put the machine into operation in a plus or minus direction.

A further object is to provide means acting during one cycle of operation to accumulate the product of two numbers, returning to normal single factor operation for the following cycles.

A still further object is to provide means whereby the multiplier-quotient dials will total correctly regardless of the number of cycles the machine has operated.

Other objects of the invention will hereinafter appear. The invention consists in the novel construction and combination of parts, as set forth in the appended claims.

In the accompanying drawings, illustrating one form of mechanism, embodying'the invention:

Fig. 1 is a top plan view of a machine embodying the invention.

Fig. 2 is a vertical sectional view taken substantially on line 2-2 Fig. 1.

Fig. 3 is a vertical sectional view, taken substantially on line 3-3, Fig. 2.

Fig. 4 is a fragmentary horizontal sectional view, taken substantially on line 4-4, Fig. 2,

showing the selectors in normal position.

Fig. 5 is a similar view showing parts in multiplying position.

Fig. 6 is a vertical sectional view, taken substantiaily on iine 66, Fig. 1, with the parts in position taken during a stopping and declutching operation. a s

Fig. 7 is a vertical sectional view, taken substan tially on line 7-7, Fig. 1.

Fig. 8 is a fragmentary view showing the 5+ and 5- key mechanism. Fig. 9 is a fragmentary sectional view, taken on line 9-9, Fig. 1, showing the operating and controlling means for the multiplier and quotient registers. v

Fig. 10 is a fragmentary rear elevation of the '50 mechanism shown in Fig. 9.

Like characters of reference refer to like parts in difierent figures of the drawings. v As illustrated, the invention is shown as applied to a machine of the well-known Monroe 'type, and it operates to change the normal setting in such a manner as to accumulate five times the amount set into the keyboard, by one cycle of operation, according in general to the disclosure of Patent No. 1,842,584, filed by George C. Chase on October 8, 1929, and issued January 26, m 1932, the parts thenreturning to normal setting, equal to the amount set into the keyboard. Any multiplier from 1 to 4 inclusive may be accommodated by making the desired number of cycles in the usual manner; a 5 multiplier by making 05 one cycle, and any multiplier greater than 5 by holding the 5+ key depressed during the desired number of cycles, the operator starting the count with 5 instead of 1- The present machine comprises two selector means, controlled from the keyboard. Normally the mechanism is set to register the amount set into the keyboard, and is operated by depressing the plus or minus key. By depressing one of the two special keys (5+ or 5-) the second selector means is called into operation, whereby five times the amount set into the keyboard is registered,

whereupon, should the key still be depressed, the machine will register normally for the following cycles, until the key is released.

The machine comprises a keyboard and selector mechanism, an actuating mechanism, an accumulator mechanism, operating devices for normal accumulation; operating devices for product accumulation and a driving mechanism.

Keyboard (Figures 1, 2 and 3) A plurality of digit setting keys 15 are mounted upon a frame work consisting of top plate'l6 and bottom plate 17, held by front cross member 18 and rear cross member 19, secured to the machine by left frame 20 and right frame 21. Keys 15am arranged in denominational rowsrunning from front to back, each row having a respective key for each significant digit from 1 to 9 inclusive. Each key is provided with a spring 22 to maintain the key in its upper position.- Each row of keys is provided with a locking bail 23, which holds the keys in depressed position by engaging notch 24. The repeat key and clear key mechanism are features common to this and other types of machines, and need not be particularly described.

Selectors (Figures 2, 3 and 43 Mounted on pivot pins 25 and 26 in cross members 27 and28 are two selector bails 29 and 30 for each denominational row oi digit keys. Bail 29 is positioned in the path of cam 31 on digit key stem 15, depression of the key rocking the bail on its pivots to an extent determined by the offset at top of the bail. Bail 30 is P sitioned in the path of cam"32 "on-dlg'it key stem 15,'andis operated in the same manner ashail 29. Both 7 bails have a yoke at the rear end, extended in position to shift selector gears 33 and 34 in longitudinal direction 'along shaft 35, to which they are keyed, selector gear 33 having teeth and selector gear 34 having 4 teeth, arranged in step formation. Bail 29 having off-sets at .top op posite the 5, 6, 7, 8 and 9 digit keys, will move selector gear 33 into the path of accumulator gear 36 only when these digit keys are depressed. Bail 30 has oil-sets at top, opposite digit keys 1 and 6 adapted to set selector gear 34 to bring one tooththereof into thepath of accumulator gear 6 '36,; oii-sets opposite digit keys 2 and 7 for a 2 teeth setting; opposite digit keys 3 and 8 for a 3 '7 teeth setting, and opposite digit keys 4 and 9 for a 37 has in one'tooth of its gear a 4 teeth setting. Thus the correct number of "teeth lie in position of accumulator gear 36 when the'respective key is depressed. This is also common to the Monroe type machine.

Registration (Figures 1, 2 and 4) In" registering the value set'in the keyboard, shaft 35, carrying selector gears 33 and 34 makes "one revolution, revolving accumulator gear 36 thef'selected number of teeth, which. gear acts on 1on1 37, the total registered in'such dial being read through dial openings in carriage 38. Dial to" contact with pawl 40 as the dial rotates 10rwardly', to or reversely from 0 registering position,

moving pawl 40 downward, to place cam 41 of said pawlin position to slide a tens carry tooth 42 into active position when its carry arm revolves. Tooth'42 will contact with accumulator gear 38 .01 next higher order-and revolve the same one tooth to accomplish the tens carry.

Now having described the mechanism ,0! the Monroetype machine in general the mechanism .will now be disclosed wherebya product is set, for registration by means or the regular addition and subtraction mechanism.

Product setting (Figures 2, a, 4 and 5) It may be well to note at this point that theme multiplier table'ne'cessitates an action on the next higher order column for each digit of the multiplican'd to register seen in this table: .ei.

sxa=4o 5x9=45 key stem has an extended cam fsce'43 (Fig. 3). adapted to rock. bail. so r the l,2,8or4therein,asls

next higher order column when the key is de'- and the bails areadjusted as hereinafter pin 39, adapted that the selector bails positions. hold 92. At each cycle cam 92 explained. The amount bail so is to be rocked, is determined by the ofl set at the top of the bail opposite the given digit key. Twoseparate series of off-sets are provided in the earn formation at the top 0! the balls, one series to set the actuators in accordance with the key values and the other series to set the actuators to live times the value of the keys depressed. Bails 29 and 30 are arranged to slideon their pivot pins and 28, torward to normal and rearwardto five times position. As will be seen in Fig. 4, which illustrates the selector-hails in normal'fr'aositidnghailsfl-zil and and higheroriier'baii' 30'- have theiHoiI-seto arranged for sliding selector gears 33 and 34 to The selected amountis registered-131mm operation with theparts inv this relation when the plus or minus key is depressed.-- F18 r e .5, illustrates the balls in position; whereintheir oil-sets provide for a registration 01 .1V? times selected amount as follows:

Portion ottlon Portion Teoth- Teetlr Teeth- Digitkey My a oi'gall "t cigar] my 114 'Fivo' 53 None,

5! One 46 -Nono 3:65 None 00 Two 41 None 61 None,

63 Two 48 Five '04 Nomi 66 Three 49- None 66 iNono 68 Three Five Q None 71 Tour -61 None 72* None;

74 Four ja liye .75 None,-

The oiI-set steps-are Joined y the settings with the digit keys depressed. -i senetor gears 33and34, upon release, arereturned to pin stops78 by pressure 01 spring-7.7.. Onoaddiam is free to melt on est m will move the balls to elther'of the twosfelector bails in position until inq'vediby' Arm 8'! is fast to sleeve" fiimd'is pin 89 to he: as. name pivotally to rocker arm 90, carrying roller finding tion with selector gear 35, I rearward and iorward, roller Mind-cam 'M' riding means for positive returnotlinkur xeys am 96, held intheir upward position b 97 and 98, against stops maroon-aye dormmaybe:

. with pawl 104, pivoted on said link. The downward'movement of link 88 engages shoulder 105 of slot 106 with pin 89, thus linking arm 87 with arm 90, so that the rise of roller 91 on cam 92 will impart rearward movement to the bails. At the end of this movement link 88 will be raised by spring 103, pawl 104 having moved from beneath arm 101 or 102 of the depressed key. Return of link 88 by the action of cam 94 will move the bails forwardly, and pawl 104 will yield against pressure of spring 107, when striking arm 101 or 102, if the related key is still held depressed, so that pin 89will slide idly in slot 106 for the following cycles of operation until the key is raised and again depressed, when spring 107 will have returned pawl 104 to its stop 108 in the path of arms 101 and '102.

Motor operation (Figures 6, 7 and 8) Keys 95 and 96 are supported upon a bracket 109 mounted on left side frame 20. Pivotally connected to the key stems are links 110 and 111, joined at lower ends by pivot pin 112. Pivot pin 112 engages in slot 113 of arm 114, which is secured to shaft 115. When key 95 is depressed arm 114 is rocked in a rearward direction, locking key 96 in upward position by link 111. When key 96 is depressed arm 114 is rocked in forward direction,

locking key 95 in upward position. This action functions on the same shaftand in the same manner as the well known plus key 116 and minus key 117 on the Monroe machine, illustrated in Patent 1,566,650, issued to George C. Chase on December 22, 1925. Slots 118 and 119 in links 110 and 111 provide means whereby the plus or minus key may function without action on the 5+ key 95,.

or 5 key 96. Arm 120 is secured to shaft 115 and when arm 114 is moved rearward in plus operation,

latch 122, pivotally connected to arm 120 engages and rocks cam plate 123, which in turn, rocks arm 121 of a clutch lever downward. The downward movement of clutch arm 121 stops the outer ring of a planetary gear train, by engaging tooth 124 with latch plate 125 on a second arm of the clutch lever, revolving the machine in a plus direction. Arm 126 is moved in upward direction at the end of the cycle, shiftingclutch arm 121 into neutral position by pin 127 engaging a cam wall of slot 128 of the clutch lever. For minus operation, clutch arm 121 is moved in an upward direction, engaging tooth 129 with latch 130 and thereby revolving machine in opposite direction. This clutch and gear train, with the controlling mechanism therefor, is well-known and fully described in Patent 1,566,650.

An excellent example of the use of the mechanism thus far described is, to be found in certain prorating calculations, wherein the amount to be prorated-is 'set. up on the keyboard; to.

represent one percent and is multiplied by each rate in turn. For instance, if the first rate were 15.63%, the total amount is multiplied by these figures, the multiplier 15.63 appearing on the register 147, and the pro-rata amount in the product register. Now, if the next rate were 20.49%, the registrations already made may be altered to bring the product register into accordance. with the new rate, which will result in a registration of the new pro-rata amount in'the product register. This is done byjdepressing add key 116, for a single plus registration in the tens order; depressing the 5- key 96,

to subtract five times-the keyboard setting, at a single cycle of operation, in the units order; depressing the subtract key 117 and holding it for two cycles in the tenths order, and by depressing the 5+ key and holding it for two cycles in the hundredths order, changing the multiplier registration from 15.63 to 20.49.

Division stop (Figure 6) Normally, the machine is brought to rest upon 'release of any depressed motor key, 95, 96,, 116

cillates freely during a registering operation. He-

lease of one of the four motor keys, however, releases cam plate 123 and pawl 159, held depressed thereby, whereupon said pawl, rising under the impulse of a spring 160, will raise trigger 157 and trip element 156. Element 156 will now fall upon rock arm 158 and, as the crank and link connections pass through dead center position, will engage shoulder 163, connecting arms 158 and 155, so that the latter will be carried against a fixed stop 161 (Fig. 6) and the rear extension 127 of arm 155 will release the clutch, as previously described.

Additional control means for this stopping mechanism is provided, operating in the manner described in Patent 1,566,650, to enable a quotient registration to be obtained by a purely routine operation of the machine.

I For this purpose, trigger 157 is extended rearwardly and provided with a cam tooth, lying in the path of movement of a pin 162 of the numeral wheel 37 associated at the time with the extreme left-hand tens carry member in the stationary portion of the machine. By t is arrangement, whenever the registration on wheels 37 changes in character from positive to negative or from negative to positive, pin 162 will move trigger 157 and trip the stop element to terminate the operation. As is well known in the art, a divisor is subtracted from a dividend until the registration becomes negative, and is alternation with the add key 116. Thus a quotient of five, for instance, would be obtained by making a subtractive registration with the five table mechanism acting, a subtractive registration with the one table mechanism automatically thrown into operation, and, after the automatic stopping of the machine, an additive registration with the one table mechanism active. This will effect an average saving of approximately one-third of the time necessary in making the calculation by means of the keys 117 and 116.

The nature of the operation with keys 96 and 116, as compared with the use of keys 117 and 116, together with the time saving effected in the former case, will be evident from an inspection of the following table, showing the sub- 1 those of gear 131.

tractive and additive operations-involved in the registration of quotient figures of different value.

This gives an average of four and a half cycles to the quotient figure, when computing by the 5- key method, as compared with an average of six and a halfcycles by the old method. Multiplier-dividend register (Figures 9 and 10) Means are provided for modifying the action of therevolutions counting dials so that they,

will register five times in one cycle of operation of the machine when the actuating means are set to accumulate a product of live. Slidably mounted on stud 141, extending from right side frame 21, is a unit consisting of a gear segment 131 of 5 teeth, and one tooth 132 ofl-set in step formation, a shifting spool 133 and a driven gear 134. A train of gears 135, 136 and 137, mounted on side frame 21 and driven by shaft 139 and gear 138, imparts one revolution to segment 131 at each cycle of the actuators. A yoked shift lever arm 148 is mounted ou pivot stud 140,- extending from side frame 21 arranged to shift the segment to bring the five teeth 131 or one' tooth 132 into operative position. A lever 142, fulc'rumed on stud 143 mounted on the side frame, engages slot 144 of shift arm 148 and at its other end is provided with a slot 145. Pin 146 of arm 84 engages lever 142 through slot 145, so that the rearward movement of arm 84 moves the slotted end of lever '142 upward, shifting segment 131 to engage its five teeth with the gear of register dial 147. The forward movement returns said segment to normal position and brings tooth 132 opposite the register gear.

For the purpose of registering positively in the counting dials during the performance of a neg-. ative calculation, such as division, change gear mechanism may be located in the revolutions counter drive train, in well known manner, or as illustrated herein, a second counting gear 149 may be employed, adapted to actuate the counting dials associated therewith to register according to an opposite sign tothat of the registration of the first described dials.

Counting gear- 149 is similar in construction to gear 131, and is connected therewith by a sleeve 150, so that both gears will be adjusted for appropriate registration by the shifting meansabove described. 01' course, since there'are nine teenfigures on the counting dialengaged by gear 149, andte'n figures on the dial engaged by gear 131, the teeth of the former gear will be finer and will extend through a lesser arc, than The calculating machine illustrated is capable of high speed operation, and it is to be noted that the selector bails 29 and 30 must take a new adjustment between the operative cycles oi. a multiplying operation. Considerable advantage is therefore obtained by'the use of the two part selector gears, in combination with these balls or other partial product plates, from the fact that they may be set from a representation of one partial product to another with a maximum movement of four steps of one bail and a one step movement of the other bail. Thiscontrasts with a maximum movement of nine steps or the partial product plates of previous constructions.

- The invention has been described and illustrated as applied to a Monroe type machine, but it is obvious that many changes could be made, suitable to this or to other types of machines, without departing from the principles of the invention. The term keyboard has been med herein as applying to a series of manually set; table levers, slides or plungers, all of which are well known equivalents when differential mechanism. I

Iclaim:

1. In acalculatingmachinehavingakeyboard, selecting means settable to represent values not in said keyboard or to represent multiples of such values, motor operated registering means, and a motor key controlling r sistrationof a given sign character;' a motor key cooperating with said registering means to eflecta registration-o! opposite sign character to that effected by the first named key, and means adjustable by the lastnamed key to set a multiple of the keyboard setting in the selecting means.

2. In a calculating machine having'a keyboard. selecting means settable to represent values set in said keyboard or to represent multiples of such values, and motor operated registeringv means; a motor key cooperating with said. means to effect an indefinite number oi successive registrations during a single depression '0! the key, means adjustable by said key to set a multiple of the keyboard setting in the selecting means, and automatically operable to reset the selecting means to correspond with the keyboard setting. 1 v

3. In a calculating machine having akeybom'd. selecting means settable' to represent values set in said keyboard or to represent multiples of such values, and motor operated registering means adapted to register the selected values positively or negatively; a motor kcycooperatlng with said registering means to determine the sign character of the'registration and to effect an indefinite number of successive registrations during a single depression of the key, and means adjustable by .said key to set a multiple '0! the keyboard sotting-in the selecting means.

4. Inacalculatingmachinehavingakeyboard. selecting means settable to represent values not in said keyboard or to represent multiples of such values, numeral wheels, and means operable to register in said wheels values set in said selecting means; a manipulable member, means adjustable by said member to set a multiple in said selecting means and automatically operable 'a to reset the selecting'means" to accord with the keyboard setting, and means controlled by said numeral wheels'to terminate the registering operation. Y 5. Inacalculatingmachinehavingakeyboord, selecting means settable to represent values not in said keyboard or to represent multiples of such values, numeral wheels, and motor operated meansadaptedtoreglstertheselectedvaluesm itively or negatively on said wheels including a motor key controlling registration of a given sign charactu;-amotorkeycooperatingwithnidmoemployed to iio tor operated means to determine registration of opposite sign character to that eflected by the first-named key and to effect an indefinite number of successive registrations during a single depression of the key, means adjustable by said last named key to set a multiple of the keyboard setting in such selectingmeans and automatically operable to reset the selecting means to correspond with the keyboard setting, and means controlled by said numeral wheels to release the motor operated means from the key and to terminate the registering operation.

6. In a calculating machine having a keyboard, selecting means settable to represent values set in said keyboard or to represent multiples of such values, and motor operated cycle registering means; a motor key cooperating with said registering means to effect an indefinite number of successive cycles or registration during a single depression of the key, means adjustable by said key to set a multiple of the keyboard setting in the selecting means, and means automatically operable at the end of the first registering cycle to reset the selecting means to correspond with the keyboard setting.

7. In a calculating machine, the combination with a multi-part selector wherein the parts are movable singly and in combination to effect selective settings representing the digits one to nine, of multiplicand setting members, multiplier setting members, and selector control means selectively settable by the multiplicand members and settable cooperatively by the multiplier members to positions corresponding to the selector movements representing a product.

GEORGE C. CHASE. 

